mozilla/fireplace — pull request #789 by cvan (2014-11-12 02:16:29+00:00)
Title: fix FxA migration popup for when HTML is served locally or from real packaged app (bug 1097409)

https://bugzilla.mozilla.org/show_bug.cgi?id=1097409

r? @mstriemer

not crazy about the data attribute. open to alternatives.